This Part Fits the following kits / parts:

#1438 - "CHUBBY" ALUMINUM HEAT SINK HEAD 60ï½˜46mm (PURPLE)

Body may to be cut if engine head touches./Tighten head screws equally.

Discontinued

"Chubby" Aluminum Heat Sink Head for the Savage monster truck!
Designed to fit both the Nitro Star 21BB and the S-25 engines, this
heat sink head provides more cooling area than the stock heads. It
is machined from billet aluminum and anodized purple for a great
custom look! Comes packaged with new head bolts and Allen wrench.
Some extra cutting of the body may be necessary.